Hello Timothe,
Thanks for bringing this up here; when i first read the news of Microsoft hijacking no-ip domain. The first technical question that came to mind was; Is Microsoft now some form of an hacker because i was just wondering how they took-over without any form of authorisation from the domain owner. However i guess the section below from your url clears it for me
Under the terms of the court decision, the DNS lookups for the domains
were passed to Microsoft's name servers, with the plan being that
Redmond would filter out No-IP subdomains linked to malicious activity
and let legitimate subdomains resolve as expected.
Having cleared the technical sides of the story, the question now is whether no-ip should bound to respond to such call from Microsoft especially since its not an act from no-ip itself but the users. One could liken this to running botnets on systems that exist on a large ISP network to attack a particular organisation. Does the victim sue the ISP or the users who don't even know they are botnet nodes.
Cheers!